diff --git a/tools/aapt/StringPool.cpp b/tools/aapt/StringPool.cpp
index 37b61bf..6cacd32 100644
--- a/tools/aapt/StringPool.cpp
+++ b/tools/aapt/StringPool.cpp
@@ -52,9 +52,9 @@
     for (size_t i=0; i<N; i++) {
         size_t len;
         if (pool->isUTF8()) {
-            uniqueStrings.add(pool->string8At(i, &len));
+            uniqueStrings.add(UnpackOptionalString(pool->string8At(i), &len));
         } else {
-            uniqueStrings.add(pool->stringAt(i, &len));
+            uniqueStrings.add(UnpackOptionalString(pool->stringAt(i), &len));
         }
     }
 
@@ -66,8 +66,8 @@
 
     const size_t NS = pool->size();
     for (size_t s=0; s<NS; s++) {
-        String8 str = pool->string8ObjectAt(s);
-        printf("String #" ZD ": %s\n", (ZD_TYPE) s, str.string());
+        auto str = pool->string8ObjectAt(s);
+        printf("String #" ZD ": %s\n", (ZD_TYPE) s, (str.has_value() ? str->string() : ""));
     }
 }